#include"stdio.h"

void swap(int *x, int *y);

void swap(int *x, int *y)
{

	int temp;

	printf("In swap ,互换前:x = %d, y= %d\n",*x,*y);
	temp = *x;
	*x = *y;
	*y = temp;
	printf("In swap ,互换后:x = %d, y= %d\n",*x,*y);
}

int main()
{

	int x = 3, y = 5;

	printf("In main ,互换前:x = %d, y= %d\n",x,y);
	swap(&x, &y);
	printf("In main ,互换后:x = %d, y= %d\n",x,y);

	return 0;
}
